(Video link) Using colored flashlights, science presenter Steve Mould explains why the color magenta doesn't appear in the rainbow.
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In this optical illusion, the magenta dots switch on and off in series, producing a green afterimage on the retina. The effect is especially strong if you look at the cross in the center. Via Biotele, thanks, Damian J.
Related topic: the yellow we see on our computer monitor or our TV isn't really yellow; it's a blend of green and red, as explained in a V-Sauce video.
Previously on GurneyJourney
Mystery of Magenta
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